title: Current frequent cigarette smoking among U.S. middle and high school students, 2000-2011.
abstract: This study assessed trends in current frequent smoking among United States middle and high school students.
  
  
  METHODS
  Data were obtained from the National Youth Tobacco Survey (2000-2011). Current frequent smoking was defined as smoking cigarettes on ≥20 days during the past 30 days. Trends were assessed using linear coefficients in a binary logistic regression (p < 0.05).
  
  
  RESULTS
  Current frequent cigarette smoking among all students declined between 2000 (6.4%) and 2011 (3.6%) (p < 0.001 for linear trend). Significant declines were observed by age, sex, race/ethnicity, school and grade level.
  
  
  CONCLUSIONS
  Sustained efforts are needed to further reduce youth use of all tobacco products.
authors.affiliation: 1Harvard School of Public Health, Center for Global Tobacco Control , Boston, Massachusetts , USA.
authors.forename: Israel Terungwa
authors.initials: IT
authors.lastname: Agaku
authors.forename: Akinyele O
authors.initials: AO
authors.lastname: Adisa
authors.forename: Ayodeji
authors.initials: A
authors.lastname: Awopegba
mesh_terms: D000293:Adolescent; D002648:Child; D005260:Female; D006801:Humans; D008297:Male; D011159:Population Surveillance; D015995:Prevalence; D012574:Schools; D012907:Smoking / Q000453:epidemiology / Q000639:trends*; D013334:Students / Q000706:statistics & numerical data*; D014481:United States